Diffusion Ant (type-hints-typescript) Code

ant/tests/test_spread_symbols.cjs
899dad6b8a9etype-hints-typescript

test_spread_symbols.cjs
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			let pass = true;

			const visible = Symbol("visible");
			const hidden = Symbol("hidden");
			const getterKey = Symbol("getter");
			let getterCalls = 0;

			const source = {
			plain: 7,
			[visible]: 11,
			};

			Object.defineProperty(source, hidden, {
			value: 13,
			enumerable: false,
			});

			Object.defineProperty(source, getterKey, {
			enumerable: true,
			get() {
			getterCalls++;
			return 17;
			},
			});

			const copy = { ...source };

			if (copy.plain !== 7) {
			console.log("FAIL: object spread should keep string-keyed data properties");
			pass = false;
			}

			if (copy[visible] !== 11) {
			console.log("FAIL: object spread should copy enumerable symbol properties");
			pass = false;
			}

			if (Object.getOwnPropertySymbols(copy).includes(hidden)) {
			console.log("FAIL: object spread should skip non-enumerable symbol properties");
			pass = false;
			}

			if (copy[getterKey] !== 17) {
			console.log("FAIL: object spread should read enumerable symbol getters");
			pass = false;
			}

			if (getterCalls !== 1) {
			console.log("FAIL: symbol getter should be invoked exactly once during spread");
			pass = false;
			}

			const getterDesc = Object.getOwnPropertyDescriptor(copy, getterKey);
			if (!getterDesc \|\| getterDesc.get) {
			console.log("FAIL: copied symbol getter should become a data property");
			pass = false;
			}

			if (!getterDesc \|\| getterDesc.value !== 17) {
			console.log("FAIL: copied symbol getter value should be materialized");
			pass = false;
			}

			if (pass) console.log("PASS");

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